how to fix BMW 3 Series G20/G21 (2019-2024) windshield wipers not working?

BMW 3 Series G20/G21 (2019-2024)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

540 words

Problem Statement

The windshield wipers on a BMW 3 Series G20/G21 (2019-2024) are not functioning, which may be due to electrical issues, a faulty wiper motor, or damaged components.

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to avoid short circuits.
•Always allow the engine to cool before working on components near the engine area.

Symptoms

•Windshield wipers do not operate at all
•Wipers move intermittently or erratically
•No sound from wiper motor when activated
•Washer fluid does not spray
•Wiper blades are not making proper contact with the windshield

Diagnostic Steps

1
Check the wiper switch on the steering column for functionality.
2
Inspect the windshield wiper fuse in the fuse box for any signs of damage or failure.
3
Use an OBD-II scanner to check for any related error codes.
4
Test the wiper motor by applying direct power to it.
5
Inspect wiring and connectors for any visible damage or corrosion.
6
Check the condition of wiper blades and linkage for proper operation.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Fuse puller
•Socket set
•Screwdrivers (flat and Phillips)
•Torque wrench

Parts Required

•Windshield wiper motor (if faulty)
•Wiper linkage (if damaged)
•Wiper blades (if worn)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Check the wiper switch on the steering column for functionality.
2
Inspect the windshield wiper fuse in the fuse box for any signs of damage or failure.
3
Use an OBD-II scanner to check for any related error codes.
4
Test the wiper motor by applying direct power to it.
5
Inspect wiring and connectors for any visible damage or corrosion.
6
Check the condition of wiper blades and linkage for proper operation.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is on a flat surface and park it with the ignition off.
Disconnect the negative battery terminal for safety.

2. Inspect and Replace Fuse

Locate the fuse box (usually found under the dashboard or in the engine compartment).
Remove the corresponding fuse for the windshield wipers using a fuse puller.
Inspect the fuse; if blown, replace it with a new one of the same amperage (check the owner’s manual for specifications).

3. Check and Replace Wiper Motor

Reconnect the battery temporarily to test the wiper switch.
If the motor is inoperative, proceed to replace it:
- Remove the wiper arms by loosening the retaining nut and lifting them off the pivot post.
- Remove the cowl panel by unscrewing any retaining screws and unclipping it from the vehicle.
- Unplug the wiper motor connector and remove the mounting bolts securing the motor to the vehicle.
- Install the new wiper motor by reversing the removal steps, ensuring all connections are secure.

4. Inspect Wiper Linkage

With the wiper motor removed, visually inspect the linkage.
If damaged, replace the linkage assembly.
Lubricate the pivot points before reassembly.

5. Reassemble and Test

Reattach the cowl panel and wiper arms.
Ensure everything is tightened according to manufacturer specifications.
Reconnect the negative battery terminal.
Test the wipers to confirm proper operation.